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[SVN r81819]
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John Maddock
2012-12-10 13:18:45 +00:00
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>POSIX Basic Regular Expression Syntax</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
<meta name="generator" content="DocBook XSL Stylesheets V1.77.1">
<link rel="home" href="../../index.html" title="Boost.Regex">
<link rel="up" href="../syntax.html" title="Regular Expression Syntax">
<link rel="prev" href="basic_extended.html" title="POSIX Extended Regular Expression Syntax">
@ -29,7 +29,7 @@
</h3></div></div></div>
<h4>
<a name="boost_regex.syntax.basic_syntax.h0"></a>
<span><a name="boost_regex.syntax.basic_syntax.synopsis"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.synopsis">Synopsis</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.synopsis"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.synopsis">Synopsis</a>
</h4>
<p>
The POSIX-Basic regular expression syntax is used by the Unix utility <code class="computeroutput"><span class="identifier">sed</span></code>, and variations are used by <code class="computeroutput"><span class="identifier">grep</span></code> and <code class="computeroutput"><span class="identifier">emacs</span></code>.
@ -44,7 +44,7 @@
</pre>
<a name="boost_regex.posix_basic"></a><h4>
<a name="boost_regex.syntax.basic_syntax.h1"></a>
<span><a name="boost_regex.syntax.basic_syntax.posix_basic_syntax"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.posix_basic_syntax">POSIX
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.posix_basic_syntax"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.posix_basic_syntax">POSIX
Basic Syntax</a>
</h4>
<p>
@ -54,13 +54,13 @@
<pre class="programlisting">.[\*^$</pre>
<h5>
<a name="boost_regex.syntax.basic_syntax.h2"></a>
<span><a name="boost_regex.syntax.basic_syntax.wildcard_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.wildcard_">Wildcard:</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.wildcard_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.wildcard_">Wildcard:</a>
</h5>
<p>
The single character '.' when used outside of a character set will match
any single character except:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
The NULL character when the flag <code class="computeroutput"><span class="identifier">match_no_dot_null</span></code>
is passed to the matching algorithms.
@ -72,7 +72,7 @@
</ul></div>
<h5>
<a name="boost_regex.syntax.basic_syntax.h3"></a>
<span><a name="boost_regex.syntax.basic_syntax.anchors_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.anchors_">Anchors:</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.anchors_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.anchors_">Anchors:</a>
</h5>
<p>
A '^' character shall match the start of a line when used as the first character
@ -84,7 +84,7 @@
</p>
<h5>
<a name="boost_regex.syntax.basic_syntax.h4"></a>
<span><a name="boost_regex.syntax.basic_syntax.marked_sub_expressions_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.marked_sub_expressions_">Marked
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.marked_sub_expressions_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.marked_sub_expressions_">Marked
sub-expressions:</a>
</h5>
<p>
@ -96,7 +96,7 @@
</p>
<h5>
<a name="boost_regex.syntax.basic_syntax.h5"></a>
<span><a name="boost_regex.syntax.basic_syntax.repeats_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.repeats_">Repeats:</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.repeats_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.repeats_">Repeats:</a>
</h5>
<p>
Any atom (a single character, a marked sub-expression, or a character class)
@ -154,7 +154,7 @@ aaaa
</p>
<h5>
<a name="boost_regex.syntax.basic_syntax.h6"></a>
<span><a name="boost_regex.syntax.basic_syntax.back_references_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.back_references_">Back
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.back_references_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.back_references_">Back
references:</a>
</h5>
<p>
@ -173,7 +173,7 @@ aaaa
<pre class="programlisting">aaabba</pre>
<h5>
<a name="boost_regex.syntax.basic_syntax.h7"></a>
<span><a name="boost_regex.syntax.basic_syntax.character_sets_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.character_sets_">Character
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.character_sets_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.character_sets_">Character
sets:</a>
</h5>
<p>
@ -186,7 +186,7 @@ aaaa
</p>
<h6>
<a name="boost_regex.syntax.basic_syntax.h8"></a>
<span><a name="boost_regex.syntax.basic_syntax.single_characters_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.single_characters_">Single
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.single_characters_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.single_characters_">Single
characters:</a>
</h6>
<p>
@ -195,7 +195,7 @@ aaaa
</p>
<h6>
<a name="boost_regex.syntax.basic_syntax.h9"></a>
<span><a name="boost_regex.syntax.basic_syntax.character_ranges_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.character_ranges_">Character
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.character_ranges_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.character_ranges_">Character
ranges:</a>
</h6>
<p>
@ -211,7 +211,7 @@ aaaa
</p>
<h6>
<a name="boost_regex.syntax.basic_syntax.h10"></a>
<span><a name="boost_regex.syntax.basic_syntax.negation_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.negation_">Negation:</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.negation_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.negation_">Negation:</a>
</h6>
<p>
If the bracket-expression begins with the ^ character, then it matches the
@ -220,7 +220,7 @@ aaaa
</p>
<h6>
<a name="boost_regex.syntax.basic_syntax.h11"></a>
<span><a name="boost_regex.syntax.basic_syntax.character_classes_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.character_classes_">Character
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.character_classes_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.character_classes_">Character
classes:</a>
</h6>
<p>
@ -230,7 +230,7 @@ aaaa
</p>
<h6>
<a name="boost_regex.syntax.basic_syntax.h12"></a>
<span><a name="boost_regex.syntax.basic_syntax.collating_elements_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.collating_elements_">Collating
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.collating_elements_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.collating_elements_">Collating
Elements:</a>
</h6>
<p>
@ -259,7 +259,7 @@ aaaa
</p>
<h6>
<a name="boost_regex.syntax.basic_syntax.h13"></a>
<span><a name="boost_regex.syntax.basic_syntax.equivalence_classes_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.equivalence_classes_">Equivalence
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.equivalence_classes_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.equivalence_classes_">Equivalence
classes:</a>
</h6>
<p>
@ -276,7 +276,7 @@ aaaa
</p>
<h6>
<a name="boost_regex.syntax.basic_syntax.h14"></a>
<span><a name="boost_regex.syntax.basic_syntax.combinations_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.combinations_">Combinations:</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.combinations_"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.combinations_">Combinations:</a>
</h6>
<p>
All of the above can be combined in one character set declaration, for example:
@ -284,7 +284,7 @@ aaaa
</p>
<h5>
<a name="boost_regex.syntax.basic_syntax.h15"></a>
<span><a name="boost_regex.syntax.basic_syntax.escapes"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.escapes">Escapes</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.escapes"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.escapes">Escapes</a>
</h5>
<p>
With the exception of the escape sequences \{, \}, \(, and \), which are
@ -299,7 +299,7 @@ aaaa
</p>
<h4>
<a name="boost_regex.syntax.basic_syntax.h16"></a>
<span><a name="boost_regex.syntax.basic_syntax.what_gets_matched"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.what_gets_matched">What
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.what_gets_matched"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.what_gets_matched">What
Gets Matched</a>
</h4>
<p>
@ -309,11 +309,11 @@ aaaa
</p>
<h4>
<a name="boost_regex.syntax.basic_syntax.h17"></a>
<span><a name="boost_regex.syntax.basic_syntax.variations"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.variations">Variations</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.variations"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.variations">Variations</a>
</h4>
<a name="boost_regex.grep_syntax"></a><h5>
<a name="boost_regex.syntax.basic_syntax.h18"></a>
<span><a name="boost_regex.syntax.basic_syntax.grep"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.grep">Grep</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.grep"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.grep">Grep</a>
</h5>
<p>
When an expression is compiled with the flag <code class="computeroutput"><span class="identifier">grep</span></code>
@ -331,7 +331,7 @@ aaaa
</p>
<h5>
<a name="boost_regex.syntax.basic_syntax.h19"></a>
<span><a name="boost_regex.syntax.basic_syntax.emacs"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.emacs">emacs</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.emacs"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.emacs">emacs</a>
</h5>
<p>
In addition to the <a class="link" href="basic_syntax.html#boost_regex.posix_basic">POSIX-Basic features</a>
@ -611,7 +611,7 @@ aaaa
</p>
<h4>
<a name="boost_regex.syntax.basic_syntax.h20"></a>
<span><a name="boost_regex.syntax.basic_syntax.options"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.options">Options</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.options"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.options">Options</a>
</h4>
<p>
There are a <a class="link" href="../ref/syntax_option_type/syntax_option_type_basic.html" title="Options for POSIX Basic Regular Expressions">variety
@ -625,7 +625,7 @@ aaaa
</p>
<h4>
<a name="boost_regex.syntax.basic_syntax.h21"></a>
<span><a name="boost_regex.syntax.basic_syntax.references"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.references">References</a>
<span class="phrase"><a name="boost_regex.syntax.basic_syntax.references"></a></span><a class="link" href="basic_syntax.html#boost_regex.syntax.basic_syntax.references">References</a>
</h4>
<p>
<a href="http://www.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap09.html" target="_top">IEEE